233131122009 has 12 divisors (see below), whose sum is σ = 336781593252. Its totient is φ = 155403837600.

The previous prime is 233131121999. The next prime is 233131122023. The reversal of 233131122009 is 900221131332.

It can be written as a sum of positive squares in 2 ways, for example, as 138832995609 + 94298126400 = 372603^2 + 307080^2 .

It is not a de Polignac number, because 233131122009 - 2¹² = 233131117913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (233131122079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1321602 + ... + 1487579.

It is an arithmetic number, because the mean of its divisors is an integer number (28065132771).

Almost surely, 2^233131122009 is an apocalyptic number.

It is an amenable number.

233131122009 is a deficient number, since it is larger than the sum of its proper divisors (103650471243).

233131122009 is a wasteful number, since it uses less digits than its factorization.

233131122009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818408 (or 2818405 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 233131122009 in words is "two hundred thirty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, nine".